Simulation and Experimental Study on Drying Process of the Household Gas Clothes Dryer

Table 3

The approximate numerical range of heat transfer coefficient on the convective heat transfer surface.

Process
Natural convection
Air	1∼10
Water	200–1000
Forced convection
Gas	20–100
High pressure vapor	500–35000
Water	1000–1500
Heat transfer with phase change of water
Boiling	2500–3500
Vapor condensation	5000–25000